Malicious PDF — malware analysis report

Static analysis result for SHA-256 11615463572f9ea5…

MALICIOUS

PDF

96.5 KB Created: 2021-07-13 03:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8fcd1f37365f120919ef33c97969b5fa SHA-1: 89262683e866d2186aa79ca54c023d8154950754 SHA-256: 11615463572f9ea5784021f6e62dd1e1223df221856aca77afb71b15e337dd9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, designed to redirect users to potentially harmful content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://coretry.ru/uplcv?utm_term=the+girl+on+the+train+full+movie+online+free PDF link annotation
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfacd0c33f---9812317065.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50043332463.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/54917859223.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202152335340.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609416707c1f6---dufata.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/26567750037.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/mixuz.pdfIn PDF document text
    • https://gotamsui.com/ck_imgs/files/14750875143.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/79242856821.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/43149d8611bcff51e27e29ad7a68795e/737764982.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/87755714423.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/vigasanirirojad.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d364840ee57---gater.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1d835daf1---57393567421.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c429699d8e2---83128994901.pdfIn PDF document text
    • https://blokhol.com/upload/files/49620030941.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/61704314572.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/8ec6eda9ec323b819541f942edbc1a12/pededuganaja.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16099a3847eb64---33216629022.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079a771a110c---65343094005.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f02f5892bd---rogaburobeta.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/mapavun.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/rikuvodilibuko.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001173e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173E 10620 bytes
SHA-256: c1248177cc4973eabf2c3303640aef2f20c8838bbd587292aa9893a6fbdbeb35
font_01_sfnt_off00012f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001476c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1476C 17288 bytes
SHA-256: 0511102b552ddde54e4dec67745394c8d883af1abba8a576201433856b4755f3

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